compDifDays(vecDates = c("28/12/15", "12/01/16", "25/01/16", "28/02/16", "15/03/16"))
compDifDays(vecDates = c("28/12/15", "12/01/14", "25/01/16", "28/02/16", "15/03/16"))
compDifDays(vecDates = c("28/12/15", "12/01/16", "25/01/16", "", ""))
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